// hangman.cpp -- some string methods
#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
#include <cctype>

using std::string;

const int NUM = 26;

const string wordlist[NUM] = {"apiary", "beetle", "cereal",
                              "danger", "ensign", "florid",
                              "garage", "health", "insult",
                              "jackal", "keeper", "loaner",
                              "manger", "nonce", "onset",
                              "plaid", "quilt", "remote",
                              "stolid", "train", "useful",
                              "valid", "whence", "xenon",
                              "yearn", "zippy"};

int main() {
    using std::cout;
    using std::cin;
    using std::tolower;
    using std::endl;
    std::srand(std::time(0));
    char play;
    cout << "Will you play a word game? <y/n> ";
    cin >> play;
    play = tolower(play);
    while (play == 'y') {
        string target = wordlist[std::rand() % NUM];
        int length = target.length();
        string attempt(length, '-');
        string bad_chars;
        int guesses = 6;
        cout << "Guess my secret word. It has " << length
             << " letters, and you guess\n"
             << "one letter at a time. You get " << guesses
             << " wrong guesses.\n";
        cout << "Your word: " << attempt << endl;
        while (guesses > 0 && attempt != target) {
            char letter;
            cout << "Guess a letter: ";
            cin >> letter;
            if (bad_chars.find(letter) != string::npos
                || attempt.find(letter) != string::npos) {
                cout << "You already guesses that. Try again.\n";
                continue;
            }
            int loc = target.find(letter);
            if (loc == string::npos) {
                cout << "Oh, bad guess!\n";
                --guesses;
                bad_chars += letter;    // add to string
            } else {
                cout << "Good guess!\n";
                attempt[loc] = letter;
                // check if letter appears again
                loc = target.find(letter, loc + 1);
                while (loc != string::npos) {
                    attempt[loc] = letter;
                    loc = target.find(letter, loc + 1);
                }
            }
            cout << "Your word: " << attempt << endl;
            if (attempt != target) {
                if (bad_chars.length() > 0)
                    cout << "Bad choices: " << bad_chars << endl;
                cout << guesses << " bad guesses left\n";
            }
        }
        if (guesses > 0)
            cout << "That's right!\n";
        else
            cout << "Sorry, the word is " << target << ".\n";
        cout << "Will you play another? <y/n> ";
        cin >> play;
        play = tolower(play);
    }
    cout << "Bye\n";
    return 0;
}